987751261 has 12 divisors (see below), whose sum is σ = 1198975392. Its totient is φ = 809832408.

The previous prime is 987751243. The next prime is 987751283. The reversal of 987751261 is 162157789.

It is a happy number.

It is not a de Polignac number, because 987751261 - 2¹⁵ = 987718493 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (987721261) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 437095 + ... + 439348.

It is an arithmetic number, because the mean of its divisors is an integer number (99914616).

Almost surely, 2^987751261 is an apocalyptic number.

It is an amenable number.

987751261 is a deficient number, since it is larger than the sum of its proper divisors (211224131).

987751261 is a wasteful number, since it uses less digits than its factorization.

987751261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 876480 (or 876473 counting only the distinct ones).

The product of its digits is 211680, while the sum is 46.

The square root of 987751261 is about 31428.5103210445. The cubic root of 987751261 is about 995.9003024486.

The spelling of 987751261 in words is "nine hundred eighty-seven million, seven hundred fifty-one thousand, two hundred sixty-one".